class Cache

The SourceIndex object indexes all the gems available from a particular source (e.g. a list of gem directories, or a remote source). A SourceIndex maps a gem full name to a gem specification.

NOTE: The class used to be named Cache, but that became confusing when cached source fetchers where introduced. The constant Gem::Cache is an alias for this class to allow old YAMLized source index objects to load properly.

Attributes

spec_dirs[RW]

Directories to use to refresh this SourceIndex when calling refresh!

Public Class Methods

from_gems_in(*spec_dirs) click to toggle source

Creates a new SourceIndex from the ruby format gem specifications in spec_dirs.

# File lib/rubygems/source_index.rb, line 66
def self.from_gems_in(*spec_dirs)
  new spec_dirs
end

from_installed_gems(*deprecated) click to toggle source

Factory method to construct a source index instance for a given path.

deprecated: If supplied, ::from_installed_gems will act just like from_gems_in. This argument is deprecated and is provided just for backwards compatibility, and should not generally be used.
return: SourceIndex instance

# File lib/rubygems/source_index.rb, line 45
def self.from_installed_gems(*deprecated)
  if deprecated.empty?
    from_gems_in(*installed_spec_directories)
  else
    warn "NOTE: from_installed_gems(arg) is deprecated. From #{caller.first}"
    from_gems_in(*deprecated) # HACK warn
  end
end

installed_spec_directories() click to toggle source

Returns a list of directories from Gem.path that contain specifications.

# File lib/rubygems/source_index.rb, line 57
def self.installed_spec_directories
  # TODO: move to Gem::Utils
  Gem.path.collect { |dir| File.join(dir, "specifications") }
end

load_specification(file_name) click to toggle source

Loads a ruby-format specification from file_name and returns the loaded spec.

# File lib/rubygems/source_index.rb, line 74
def self.load_specification(file_name)
  Gem::Deprecate.skip_during do
    Gem::Specification.load Gem::Path.new(file_name)
  end
end

new(specs_or_dirs = []) click to toggle source

Constructs a source index instance from the provided specifications, which is a Hash of gem full names and Gem::Specifications.

# File lib/rubygems/source_index.rb, line 84
def initialize specs_or_dirs = []
  @gems = {}
  @spec_dirs = nil

  case specs_or_dirs
  when Hash then
    specs_or_dirs.each do |full_name, spec|
      add_spec spec
    end
  when Array, String then
    self.spec_dirs = Array(specs_or_dirs)
    refresh!
  else
    arg = specs_or_dirs.inspect
    warn "NOTE: SourceIndex.new(#{arg}) is deprecated; From #{caller.first}."
  end
end

Public Instance Methods

add_spec(gem_spec, name = gem_spec.full_name) click to toggle source

Add a gem specification to the source index.

# File lib/rubygems/source_index.rb, line 186
def add_spec(gem_spec, name = gem_spec.full_name)
  # No idea why, but the Indexer wants to insert them using original_name
  # instead of full_name. So we make it an optional arg.
  @gems[name] = gem_spec
end

add_specs(*gem_specs) click to toggle source

Add gem specifications to the source index.

# File lib/rubygems/source_index.rb, line 195
def add_specs(*gem_specs)
  Gem::Deprecate.skip_during do
    gem_specs.each do |spec|
      add_spec spec
    end
  end
end

all_gems() click to toggle source

# File lib/rubygems/source_index.rb, line 102
def all_gems
  gems
end

dump() click to toggle source

# File lib/rubygems/source_index.rb, line 350
def dump
  Marshal.dump(self)
end

each() { |full_name, gem| ... } click to toggle source

Iterate over the specifications in the source index.

# File lib/rubygems/source_index.rb, line 213
def each(&block) # :yields: gem.full_name, gem
  @gems.each(&block)
end

find_name(gem_name, requirement = Gem::Requirement.default) click to toggle source

Find a gem by an exact match on the short name.

# File lib/rubygems/source_index.rb, line 251
def find_name(gem_name, requirement = Gem::Requirement.default)
  dep = Gem::Dependency.new gem_name, requirement

  Gem::Deprecate.skip_during do
    search dep
  end
end

gem_signature(gem_full_name) click to toggle source

The signature for the given gem specification.

# File lib/rubygems/source_index.rb, line 237
def gem_signature(gem_full_name)
  require 'digest'

  Digest::SHA256.new.hexdigest(@gems[gem_full_name].to_yaml).to_s
end

index_signature() click to toggle source

The signature for the source index. Changes in the signature indicate a change in the index.

# File lib/rubygems/source_index.rb, line 228
def index_signature
  require 'digest'

  Digest::SHA256.new.hexdigest(@gems.keys.sort.join(',')).to_s
end

latest_specs(include_prerelease=false) click to toggle source

Returns an Array specifications for the latest released versions of each gem in this index.

# File lib/rubygems/source_index.rb, line 138
def latest_specs(include_prerelease=false)
  result = Hash.new { |h,k| h[k] = [] }
  latest = {}

  sort.each do |_, spec|
    name = spec.name
    curr_ver = spec.version
    prev_ver = latest.key?(name) ? latest[name].version : nil

    next if !include_prerelease && curr_ver.prerelease?
    next unless prev_ver.nil? or curr_ver >= prev_ver or
                latest[name].platform != Gem::Platform::RUBY

    if prev_ver.nil? or
       (curr_ver > prev_ver and spec.platform == Gem::Platform::RUBY) then
      result[name].clear
      latest[name] = spec
    end

    if spec.platform != Gem::Platform::RUBY then
      result[name].delete_if do |result_spec|
        result_spec.platform == spec.platform
      end
    end

    result[name] << spec
  end

  result.values.flatten
end

length()

Alias for: size

load_gems_in(*spec_dirs) click to toggle source

Reconstruct the source index from the specifications in spec_dirs.

# File lib/rubygems/source_index.rb, line 117
def load_gems_in(*spec_dirs)
  @gems.clear

  spec_dirs.reverse_each do |spec_dir|
    spec_files = Dir[File.join(spec_dir, "*.gemspec")]

    spec_files.each do |spec_file|
      gemspec = Gem::Deprecate.skip_during do
        Gem::Specification.load spec_file
      end
      add_spec gemspec if gemspec
    end
  end

  self
end

outdated() click to toggle source

Returns an Array of Gem::Specifications that are not up to date.

# File lib/rubygems/source_index.rb, line 328
def outdated
  outdateds = []

  latest_specs.each do |local|
    dependency = Gem::Dependency.new local.name, ">= #{local.version}"

    fetcher = Gem::SpecFetcher.fetcher
    remotes = fetcher.find_matching dependency
    remotes = remotes.map { |(_, version, _), _| version }

    latest = remotes.sort.last

    outdateds << local.name if latest and local.version < latest
  end

  outdateds
end

prerelease_gems() click to toggle source

# File lib/rubygems/source_index.rb, line 106
def prerelease_gems
  @gems.reject { |name, gem| !gem.version.prerelease? }
end

prerelease_specs() click to toggle source

An array including only the prerelease gemspecs

# File lib/rubygems/source_index.rb, line 172
def prerelease_specs
  prerelease_gems.values
end

refresh!() click to toggle source

Replaces the gems in the source index from specifications in the directories this source index was created from. Raises an exception if this source index wasn't created from a directory (via ::from_gems_in or ::from_installed_gems, or having #spec_dirs set).

# File lib/rubygems/source_index.rb, line 320
def refresh!
  raise 'source index not created from disk' if @spec_dirs.nil?
  load_gems_in(*@spec_dirs)
end

released_gems() click to toggle source

# File lib/rubygems/source_index.rb, line 110
def released_gems
  @gems.reject { |name, gem| gem.version.prerelease? }
end

released_specs() click to toggle source

An array including only the released gemspecs

# File lib/rubygems/source_index.rb, line 179
def released_specs
  released_gems.values
end

remove_spec(full_name) click to toggle source

Remove a gem specification named full_name.

# File lib/rubygems/source_index.rb, line 206
def remove_spec(full_name)
  @gems.delete full_name
end

search(gem_pattern, platform_or_requirement = false) click to toggle source

Search for a gem by Gem::Dependency gem_pattern. If only_platform is true, only gems matching Gem::Platform.local will be returned. An Array of matching Gem::Specification objects is returned.

For backwards compatibility, a String or Regexp pattern may be passed as gem_pattern, and a Gem::Requirement for platform_only. This behavior is deprecated and will be removed.

# File lib/rubygems/source_index.rb, line 268
def search(gem_pattern, platform_or_requirement = false)
  requirement = nil
  only_platform = false # FIX: WTF is this?!?

  # TODO - Remove support and warning for legacy arguments after 2008/11
  unless Gem::Dependency === gem_pattern
    warn "#{Gem.location_of_caller.join ':'}:Warning: Gem::SourceIndex#search support for #{gem_pattern.class} patterns is deprecated, use #find_name"
  end

  case gem_pattern
  when Regexp then
    requirement = platform_or_requirement || Gem::Requirement.default
  when Gem::Dependency then
    only_platform = platform_or_requirement
    requirement = gem_pattern.requirement

    gem_pattern = if Regexp === gem_pattern.name then
                    gem_pattern.name
                  elsif gem_pattern.name.empty? then
                    //
                  else
                    /^#{Regexp.escape gem_pattern.name}$/
                  end
  else
    requirement = platform_or_requirement || Gem::Requirement.default
    gem_pattern = /#{gem_pattern}/i
  end

  unless Gem::Requirement === requirement then
    requirement = Gem::Requirement.create requirement
  end

  specs = @gems.values.select do |spec|
    spec.name =~ gem_pattern and
      requirement.satisfied_by? spec.version
  end

  if only_platform then
    specs = specs.select do |spec|
      Gem::Platform.match spec.platform
    end
  end

  specs.sort_by { |s| s.sort_obj }
end

size() click to toggle source

# File lib/rubygems/source_index.rb, line 243
def size
  @gems.size
end

Also aliased as: length

specification(full_name) click to toggle source

The gem specification given a full gem spec name.

# File lib/rubygems/source_index.rb, line 220
def specification(full_name)
  @gems[full_name]
end